Under Chinese rules, both players should pass, and all stones are alive in seki.
Under Japanese rules, both players should pass, but all White stones are dead (and removed), and all Black stones are alive*.
*Even though it seems redundant, I’m pedantically saying that all of the Black stones are alive and that the dead White stones are removed, just to clarify that there are not any other weird situations going on, like dead stones not being removed due to anti-seki or residing in the eye of a seki.